/*
 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.tools.agentscript.impl;

import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import org.graalvm.polyglot.Value;

@SuppressWarnings({"static-method"})
@ExportLibrary(InteropLibrary.class)
final class RawObjectExtractor implements TruffleObject {
    private Object obj;

    private RawObjectExtractor() {
    }

    static Object toRaw(Value v) {
        if (v.getContext() == null) {
            return v.as(Object.class);
        }
        final RawObjectExtractor extractor = new RawObjectExtractor();
        v.getContext().asValue(extractor).execute(v);
        return extractor.obj;
    }

    @ExportMessage
    static boolean isExecutable(RawObjectExtractor obj) {
        return obj != null;
    }

    @ExportMessage
    Object execute(Object[] args) {
        return this.obj = args[0];
    }
}
